| 摘要 |
The invention relates to devices for measuring a deformation using an optical fiber as sensing element, with the option of measuring the distribution of a deformation of the optical fiber in the longitudinal direction. The invention makes it possible to limit the force transmitted by an anchor to a detection cable in the event of the anchors shifting relative to one another as a result of movements of the ground which are not dependent on the properties of the ground, which properties may be known imprecisely or may change over time, and, on the basis of this, to extend the service life of the detection cable. The device for measuring deformations of the ground comprises an optical detection cable which is sensitive to deformation, a measuring unit which is connected to the cable, and anchors which are connected to the cable and to the ground, and is equipped with a system for protecting the cable from destruction, said system comprising a safety device built into each anchor. |
